If no, why not then give me half of your earnings?
Because you are making a logical mistake here. Why should I? You are transferring to a personal level a global market. When halving occurs, everything else, the rest of the Bitcoin economy, is indexed to that pretty quickly.
It is not
my mistake. You shouldn't, but this is exactly the same situation why you wouldn't (want to) give half of your earnings in favor of some vague concept you called a global market. Money is always personal, wtf. And I'm highly dubious that you actually mine Bitcoin these days...
But you are welcome to leave a message on the blockchain